ci: simplify format test

.github/workflows/ci.yml

@@ -28,14 +28,14 @@ jobs:
         run: rm -rf lib/gen
       - name: Check format (app)
         working-directory: app
-        run: dart format --line-length 150 --set-exit-if-changed lib test
+        run: dart format --set-exit-if-changed lib test
 
       - name: Dependencies (common)
         working-directory: common
         run: dart pub get
       - name: Check format (common)
         working-directory: common
-        run: dart format --line-length 150 --set-exit-if-changed lib test
+        run: dart format --set-exit-if-changed lib test
 
   test:
     runs-on: ubuntu-latest

common/analysis_options.yaml

@@ -1,5 +1,9 @@
 include: package:lints/recommended.yaml
 
+formatter:
+  trailing_commas: preserve
+  page_width: 150
+
 linter:
   rules:
     prefer_single_quotes: true